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Dockerfile

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+FROM python:3.10
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    ffmpeg \
+    libgl1 \
+    libglib2.0-0 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create non-root user (HF best practice)
+RUN useradd -m -u 1000 user
+USER user
+
+ENV PATH=/home/user/.local/bin:$PATH
+WORKDIR /app
+
+# Copy requirements first (better caching)
+COPY --chown=user requirements.txt .
+
+RUN pip install --no-cache-dir --upgrade pip \
+ && pip install --no-cache-dir -r requirements.txt
+
+# Copy project files
+COPY --chown=user . .
+
+# HuggingFace expects port 7860
+EXPOSE 7860
+
+# IMPORTANT: start FastAPI properly
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]

app.py

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+from fastapi import FastAPI, UploadFile, Form
+from fastapi.responses import FileResponse
+import os, shutil
+
+from image.qr import generate_qr
+from image.watermark import add_qr_to_background
+
+app = FastAPI()
+
+TEMP_DIR = "temp"
+os.makedirs(TEMP_DIR, exist_ok=True)
+
+@app.post("/background")
+async def create_background(
+    file: UploadFile,
+    premium: bool = Form(False)
+):
+    input_path = f"{TEMP_DIR}/input.png"
+    output_path = f"{TEMP_DIR}/output.png"
+
+    with open(input_path, "wb") as f:
+        f.write(await file.read())
+
+    if premium:
+        shutil.copy(input_path, output_path)
+    else:
+        qr = generate_qr("https://cloudfom.org")
+        add_qr_to_background(input_path, output_path, qr)
+
+    return FileResponse(output_path, media_type="image/png")

image/qr.py

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+import qrcode
+
+def generate_qr(url: str):
+    qr = qrcode.make(url)
+    qr = qr.resize((120, 120))
+    return qr

image/renderer.py

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+from moviepy.editor import ImageSequenceClip
+import os
+
+def render_video(frames_dir, output_path, fps=30):
+    frames = sorted([
+        os.path.join(frames_dir, f)
+        for f in os.listdir(frames_dir)
+        if f.endswith(".png")
+    ])
+
+    clip = ImageSequenceClip(frames, fps=fps)
+    clip.write_videofile(output_path, codec="libx264")

image/watermark.py

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+from PIL import Image, ImageDraw, ImageFont
+
+def add_qr_to_background(img_path, output_path, qr_img):
+    img = Image.open(img_path).convert("RGBA")
+
+    qr_x = img.width - qr_img.width - 24
+    qr_y = img.height - qr_img.height - 48
+
+    img.paste(qr_img, (qr_x, qr_y), qr_img)
+
+    draw = ImageDraw.Draw(img)
+    font = ImageFont.load_default()
+
+    draw.text(
+        (qr_x, qr_y + qr_img.height + 6),
+        "Lyric Video Maker",
+        fill=(255, 255, 255, 180),
+        font=font
+    )
+
+    img.save(output_path)

requirements.txt

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+fastapi
+uvicorn
+pillow
+qrcode
+moviepy
+opencv-python-headless
+python-multipart